Which pioneering product design approach revolutionized observatory gift shops in the 2010s, making complex astronomical concepts more accessible to the general public?

Major observatories around the world have revolutionized their visitor experience through thoughtful product design and merchandising. Their gift shops are carefully crafted to extend the educational journey while generating revenue to support scientific endeavors. Test your knowledge about how astronomy centers translate complex cosmic concepts into tangible retail products that visitors can take home. This question explores the intersection of astronomy education and product design innovation.

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Modular Scale Models - allowing visitors to build their own accurate solar system or galaxy models piece by piece
Interactive Hologram Cards - featuring planets and celestial phenomena that appear 3D when viewed through special lenses
Constellation Fashion - clothing lines with patterns that reveal star formations when photographed with flash
Gravity Simulation Toys - demonstrating principles of orbital mechanics through magnetic field interactions